
s=input()
s1=""
for c in s:
    if c=="(":
        s1+=c
    if c==")":
        if len(s1)>0:
            if s1[len(s1)-1]=="(":
                s1=s1[:-1]
    if c == "[":
        s1 += c
    if c == "]":
        if len(s1) > 0:
            if s1[len(s1) - 1] == "[":
                s1 = s1[:-1]
if len(s1)==0:
    print("True")
else:
    print("False")

